Running bike



FIG. 1 is a top plan view of a running bike showing the design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is a rear elevational view thereof.

The broken lines illustrate portions of the running bike that form nopart of the claimed design.

The ornamental design for a running bike, as shown and described.